"And I need to select different lines on a 600 to those I'd use on a superbike.
"I'm having to relearn a few things.
"At the moment, I'm riding the Yamaha R6 in stock trim but it will soon be in supersport specifications."
Holmes finished with a hat-trick of fourth placings in the superbike class at Manfeild that day - behind Tauranga's Sloan Frost (BMW), Hawera's Hayden Fitzgerald (Honda) and Auckland's Jaden Hassan (Yamaha), and he managed to take his Yamaha R6 to 7-7-4 placings in the formula two class.
Holmes is now in the runner-up position in the formula one class standings, just 16 points behind the series leader, Lower Hutt's Roger Cathro (Yamaha).
But it's the 600cc class where Holmes is most keen to develop.
He has time on his side with the start of the season still several months away. And with two more rounds remaining in the Actrix Winter Series, there is no doubt that Holmes will take every opportunity to hone his 600cc class skills on his John Tuhoe Racing and Mount Motorcycles-supported Yamaha R6.
The next round of the Actrix series is set for Manfeild in just two weeks, on September 24.